1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2017 Intel Deutschland GmbH 8 * Copyright (C) 2018 - 2019 Intel Corporation 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/fips.h> 14 #include <linux/init.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/bitmap.h> 23 #include <linux/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/addrconf.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wep.h" 33 #include "led.h" 34 #include "debugfs.h" 35 36 void ieee80211_configure_filter(struct ieee80211_local *local) 37 { 38 u64 mc; 39 unsigned int changed_flags; 40 unsigned int new_flags = 0; 41 42 if (atomic_read(&local->iff_allmultis)) 43 new_flags |= FIF_ALLMULTI; 44 45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 47 new_flags |= FIF_BCN_PRBRESP_PROMISC; 48 49 if (local->fif_probe_req || local->probe_req_reg) 50 new_flags |= FIF_PROBE_REQ; 51 52 if (local->fif_fcsfail) 53 new_flags |= FIF_FCSFAIL; 54 55 if (local->fif_plcpfail) 56 new_flags |= FIF_PLCPFAIL; 57 58 if (local->fif_control) 59 new_flags |= FIF_CONTROL; 60 61 if (local->fif_other_bss) 62 new_flags |= FIF_OTHER_BSS; 63 64 if (local->fif_pspoll) 65 new_flags |= FIF_PSPOLL; 66 67 if (local->rx_mcast_action_reg) 68 new_flags |= FIF_MCAST_ACTION; 69 70 spin_lock_bh(&local->filter_lock); 71 changed_flags = local->filter_flags ^ new_flags; 72 73 mc = drv_prepare_multicast(local, &local->mc_list); 74 spin_unlock_bh(&local->filter_lock); 75 76 /* be a bit nasty */ 77 new_flags |= (1<<31); 78 79 drv_configure_filter(local, changed_flags, &new_flags, mc); 80 81 WARN_ON(new_flags & (1<<31)); 82 83 local->filter_flags = new_flags & ~(1<<31); 84 } 85 86 static void ieee80211_reconfig_filter(struct work_struct *work) 87 { 88 struct ieee80211_local *local = 89 container_of(work, struct ieee80211_local, reconfig_filter); 90 91 ieee80211_configure_filter(local); 92 } 93 94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 95 { 96 struct ieee80211_sub_if_data *sdata; 97 struct cfg80211_chan_def chandef = {}; 98 u32 changed = 0; 99 int power; 100 u32 offchannel_flag; 101 102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 103 104 if (local->scan_chandef.chan) { 105 chandef = local->scan_chandef; 106 } else if (local->tmp_channel) { 107 chandef.chan = local->tmp_channel; 108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 109 chandef.center_freq1 = chandef.chan->center_freq; 110 chandef.freq1_offset = chandef.chan->freq_offset; 111 } else 112 chandef = local->_oper_chandef; 113 114 WARN(!cfg80211_chandef_valid(&chandef), 115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 116 chandef.chan->center_freq, chandef.chan->freq_offset, 117 chandef.width, chandef.center_freq1, chandef.freq1_offset, 118 chandef.center_freq2); 119 120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 122 else 123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 124 125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 126 127 if (offchannel_flag || 128 !cfg80211_chandef_identical(&local->hw.conf.chandef, 129 &local->_oper_chandef)) { 130 local->hw.conf.chandef = chandef; 131 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 132 } 133 134 if (!conf_is_ht(&local->hw.conf)) { 135 /* 136 * mac80211.h documents that this is only valid 137 * when the channel is set to an HT type, and 138 * that otherwise STATIC is used. 139 */ 140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 141 } else if (local->hw.conf.smps_mode != local->smps_mode) { 142 local->hw.conf.smps_mode = local->smps_mode; 143 changed |= IEEE80211_CONF_CHANGE_SMPS; 144 } 145 146 power = ieee80211_chandef_max_power(&chandef); 147 148 rcu_read_lock(); 149 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 150 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 151 continue; 152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 153 continue; 154 if (sdata->vif.bss_conf.txpower == INT_MIN) 155 continue; 156 power = min(power, sdata->vif.bss_conf.txpower); 157 } 158 rcu_read_unlock(); 159 160 if (local->hw.conf.power_level != power) { 161 changed |= IEEE80211_CONF_CHANGE_POWER; 162 local->hw.conf.power_level = power; 163 } 164 165 return changed; 166 } 167 168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 169 { 170 int ret = 0; 171 172 might_sleep(); 173 174 if (!local->use_chanctx) 175 changed |= ieee80211_hw_conf_chan(local); 176 else 177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 178 IEEE80211_CONF_CHANGE_POWER); 179 180 if (changed && local->open_count) { 181 ret = drv_config(local, changed); 182 /* 183 * Goal: 184 * HW reconfiguration should never fail, the driver has told 185 * us what it can support so it should live up to that promise. 186 * 187 * Current status: 188 * rfkill is not integrated with mac80211 and a 189 * configuration command can thus fail if hardware rfkill 190 * is enabled 191 * 192 * FIXME: integrate rfkill with mac80211 and then add this 193 * WARN_ON() back 194 * 195 */ 196 /* WARN_ON(ret); */ 197 } 198 199 return ret; 200 } 201 202 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 203 u32 changed) 204 { 205 struct ieee80211_local *local = sdata->local; 206 207 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 208 return; 209 210 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 211 } 212 213 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 214 { 215 sdata->vif.bss_conf.use_cts_prot = false; 216 sdata->vif.bss_conf.use_short_preamble = false; 217 sdata->vif.bss_conf.use_short_slot = false; 218 return BSS_CHANGED_ERP_CTS_PROT | 219 BSS_CHANGED_ERP_PREAMBLE | 220 BSS_CHANGED_ERP_SLOT; 221 } 222 223 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 224 { 225 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 226 struct sk_buff *skb; 227 228 while ((skb = skb_dequeue(&local->skb_queue)) || 229 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 230 switch (skb->pkt_type) { 231 case IEEE80211_RX_MSG: 232 /* Clear skb->pkt_type in order to not confuse kernel 233 * netstack. */ 234 skb->pkt_type = 0; 235 ieee80211_rx(&local->hw, skb); 236 break; 237 case IEEE80211_TX_STATUS_MSG: 238 skb->pkt_type = 0; 239 ieee80211_tx_status(&local->hw, skb); 240 break; 241 default: 242 WARN(1, "mac80211: Packet is of unknown type %d\n", 243 skb->pkt_type); 244 dev_kfree_skb(skb); 245 break; 246 } 247 } 248 } 249 250 static void ieee80211_restart_work(struct work_struct *work) 251 { 252 struct ieee80211_local *local = 253 container_of(work, struct ieee80211_local, restart_work); 254 struct ieee80211_sub_if_data *sdata; 255 256 /* wait for scan work complete */ 257 flush_workqueue(local->workqueue); 258 flush_work(&local->sched_scan_stopped_work); 259 260 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 261 "%s called with hardware scan in progress\n", __func__); 262 263 flush_work(&local->radar_detected_work); 264 /* we might do interface manipulations, so need both */ 265 rtnl_lock(); 266 wiphy_lock(local->hw.wiphy); 267 list_for_each_entry(sdata, &local->interfaces, list) { 268 /* 269 * XXX: there may be more work for other vif types and even 270 * for station mode: a good thing would be to run most of 271 * the iface type's dependent _stop (ieee80211_mg_stop, 272 * ieee80211_ibss_stop) etc... 273 * For now, fix only the specific bug that was seen: race 274 * between csa_connection_drop_work and us. 275 */ 276 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 277 /* 278 * This worker is scheduled from the iface worker that 279 * runs on mac80211's workqueue, so we can't be 280 * scheduling this worker after the cancel right here. 281 * The exception is ieee80211_chswitch_done. 282 * Then we can have a race... 283 */ 284 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 285 } 286 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 287 } 288 ieee80211_scan_cancel(local); 289 290 /* make sure any new ROC will consider local->in_reconfig */ 291 flush_delayed_work(&local->roc_work); 292 flush_work(&local->hw_roc_done); 293 294 /* wait for all packet processing to be done */ 295 synchronize_net(); 296 297 ieee80211_reconfig(local); 298 wiphy_unlock(local->hw.wiphy); 299 rtnl_unlock(); 300 } 301 302 void ieee80211_restart_hw(struct ieee80211_hw *hw) 303 { 304 struct ieee80211_local *local = hw_to_local(hw); 305 306 trace_api_restart_hw(local); 307 308 wiphy_info(hw->wiphy, 309 "Hardware restart was requested\n"); 310 311 /* use this reason, ieee80211_reconfig will unblock it */ 312 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 313 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 314 false); 315 316 /* 317 * Stop all Rx during the reconfig. We don't want state changes 318 * or driver callbacks while this is in progress. 319 */ 320 local->in_reconfig = true; 321 barrier(); 322 323 queue_work(system_freezable_wq, &local->restart_work); 324 } 325 EXPORT_SYMBOL(ieee80211_restart_hw); 326 327 #ifdef CONFIG_INET 328 static int ieee80211_ifa_changed(struct notifier_block *nb, 329 unsigned long data, void *arg) 330 { 331 struct in_ifaddr *ifa = arg; 332 struct ieee80211_local *local = 333 container_of(nb, struct ieee80211_local, 334 ifa_notifier); 335 struct net_device *ndev = ifa->ifa_dev->dev; 336 struct wireless_dev *wdev = ndev->ieee80211_ptr; 337 struct in_device *idev; 338 struct ieee80211_sub_if_data *sdata; 339 struct ieee80211_bss_conf *bss_conf; 340 struct ieee80211_if_managed *ifmgd; 341 int c = 0; 342 343 /* Make sure it's our interface that got changed */ 344 if (!wdev) 345 return NOTIFY_DONE; 346 347 if (wdev->wiphy != local->hw.wiphy) 348 return NOTIFY_DONE; 349 350 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 351 bss_conf = &sdata->vif.bss_conf; 352 353 /* ARP filtering is only supported in managed mode */ 354 if (sdata->vif.type != NL80211_IFTYPE_STATION) 355 return NOTIFY_DONE; 356 357 idev = __in_dev_get_rtnl(sdata->dev); 358 if (!idev) 359 return NOTIFY_DONE; 360 361 ifmgd = &sdata->u.mgd; 362 sdata_lock(sdata); 363 364 /* Copy the addresses to the bss_conf list */ 365 ifa = rtnl_dereference(idev->ifa_list); 366 while (ifa) { 367 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 368 bss_conf->arp_addr_list[c] = ifa->ifa_address; 369 ifa = rtnl_dereference(ifa->ifa_next); 370 c++; 371 } 372 373 bss_conf->arp_addr_cnt = c; 374 375 /* Configure driver only if associated (which also implies it is up) */ 376 if (ifmgd->associated) 377 ieee80211_bss_info_change_notify(sdata, 378 BSS_CHANGED_ARP_FILTER); 379 380 sdata_unlock(sdata); 381 382 return NOTIFY_OK; 383 } 384 #endif 385 386 #if IS_ENABLED(CONFIG_IPV6) 387 static int ieee80211_ifa6_changed(struct notifier_block *nb, 388 unsigned long data, void *arg) 389 { 390 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 391 struct inet6_dev *idev = ifa->idev; 392 struct net_device *ndev = ifa->idev->dev; 393 struct ieee80211_local *local = 394 container_of(nb, struct ieee80211_local, ifa6_notifier); 395 struct wireless_dev *wdev = ndev->ieee80211_ptr; 396 struct ieee80211_sub_if_data *sdata; 397 398 /* Make sure it's our interface that got changed */ 399 if (!wdev || wdev->wiphy != local->hw.wiphy) 400 return NOTIFY_DONE; 401 402 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 403 404 /* 405 * For now only support station mode. This is mostly because 406 * doing AP would have to handle AP_VLAN in some way ... 407 */ 408 if (sdata->vif.type != NL80211_IFTYPE_STATION) 409 return NOTIFY_DONE; 410 411 drv_ipv6_addr_change(local, sdata, idev); 412 413 return NOTIFY_OK; 414 } 415 #endif 416 417 /* There isn't a lot of sense in it, but you can transmit anything you like */ 418 static const struct ieee80211_txrx_stypes 419 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 420 [NL80211_IFTYPE_ADHOC] = { 421 .tx = 0xffff, 422 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 423 BIT(IEEE80211_STYPE_AUTH >> 4) | 424 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 426 }, 427 [NL80211_IFTYPE_STATION] = { 428 .tx = 0xffff, 429 /* 430 * To support Pre Association Security Negotiation (PASN) while 431 * already associated to one AP, allow user space to register to 432 * Rx authentication frames, so that the user space logic would 433 * be able to receive/handle authentication frames from a 434 * different AP as part of PASN. 435 * It is expected that user space would intelligently register 436 * for Rx authentication frames, i.e., only when PASN is used 437 * and configure a match filter only for PASN authentication 438 * algorithm, as otherwise the MLME functionality of mac80211 439 * would be broken. 440 */ 441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 442 BIT(IEEE80211_STYPE_AUTH >> 4) | 443 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 444 }, 445 [NL80211_IFTYPE_AP] = { 446 .tx = 0xffff, 447 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 448 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 449 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 450 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 451 BIT(IEEE80211_STYPE_AUTH >> 4) | 452 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 453 BIT(IEEE80211_STYPE_ACTION >> 4), 454 }, 455 [NL80211_IFTYPE_AP_VLAN] = { 456 /* copy AP */ 457 .tx = 0xffff, 458 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 459 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 460 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 461 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 462 BIT(IEEE80211_STYPE_AUTH >> 4) | 463 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 464 BIT(IEEE80211_STYPE_ACTION >> 4), 465 }, 466 [NL80211_IFTYPE_P2P_CLIENT] = { 467 .tx = 0xffff, 468 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 469 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 470 }, 471 [NL80211_IFTYPE_P2P_GO] = { 472 .tx = 0xffff, 473 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 474 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 475 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 476 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 477 BIT(IEEE80211_STYPE_AUTH >> 4) | 478 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 479 BIT(IEEE80211_STYPE_ACTION >> 4), 480 }, 481 [NL80211_IFTYPE_MESH_POINT] = { 482 .tx = 0xffff, 483 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 484 BIT(IEEE80211_STYPE_AUTH >> 4) | 485 BIT(IEEE80211_STYPE_DEAUTH >> 4), 486 }, 487 [NL80211_IFTYPE_P2P_DEVICE] = { 488 .tx = 0xffff, 489 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 490 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 491 }, 492 }; 493 494 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 495 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 496 IEEE80211_HT_AMPDU_PARM_DENSITY, 497 498 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 499 IEEE80211_HT_CAP_MAX_AMSDU | 500 IEEE80211_HT_CAP_SGI_20 | 501 IEEE80211_HT_CAP_SGI_40 | 502 IEEE80211_HT_CAP_TX_STBC | 503 IEEE80211_HT_CAP_RX_STBC | 504 IEEE80211_HT_CAP_LDPC_CODING | 505 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 506 .mcs = { 507 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 508 0xff, 0xff, 0xff, 0xff, 0xff, }, 509 }, 510 }; 511 512 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 513 .vht_cap_info = 514 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 515 IEEE80211_VHT_CAP_SHORT_GI_80 | 516 IEEE80211_VHT_CAP_SHORT_GI_160 | 517 IEEE80211_VHT_CAP_RXSTBC_MASK | 518 IEEE80211_VHT_CAP_TXSTBC | 519 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 520 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 521 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 522 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 523 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 524 .supp_mcs = { 525 .rx_mcs_map = cpu_to_le16(~0), 526 .tx_mcs_map = cpu_to_le16(~0), 527 }, 528 }; 529 530 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 531 const struct ieee80211_ops *ops, 532 const char *requested_name) 533 { 534 struct ieee80211_local *local; 535 int priv_size, i; 536 struct wiphy *wiphy; 537 bool use_chanctx; 538 539 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 540 !ops->add_interface || !ops->remove_interface || 541 !ops->configure_filter)) 542 return NULL; 543 544 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 545 return NULL; 546 547 /* check all or no channel context operations exist */ 548 i = !!ops->add_chanctx + !!ops->remove_chanctx + 549 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 550 !!ops->unassign_vif_chanctx; 551 if (WARN_ON(i != 0 && i != 5)) 552 return NULL; 553 use_chanctx = i == 5; 554 555 /* Ensure 32-byte alignment of our private data and hw private data. 556 * We use the wiphy priv data for both our ieee80211_local and for 557 * the driver's private data 558 * 559 * In memory it'll be like this: 560 * 561 * +-------------------------+ 562 * | struct wiphy | 563 * +-------------------------+ 564 * | struct ieee80211_local | 565 * +-------------------------+ 566 * | driver's private data | 567 * +-------------------------+ 568 * 569 */ 570 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 571 572 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 573 574 if (!wiphy) 575 return NULL; 576 577 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 578 579 wiphy->privid = mac80211_wiphy_privid; 580 581 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 582 WIPHY_FLAG_4ADDR_AP | 583 WIPHY_FLAG_4ADDR_STATION | 584 WIPHY_FLAG_REPORTS_OBSS | 585 WIPHY_FLAG_OFFCHAN_TX; 586 587 if (!use_chanctx || ops->remain_on_channel) 588 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 589 590 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 591 NL80211_FEATURE_SAE | 592 NL80211_FEATURE_HT_IBSS | 593 NL80211_FEATURE_VIF_TXPOWER | 594 NL80211_FEATURE_MAC_ON_CREATE | 595 NL80211_FEATURE_USERSPACE_MPM | 596 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 597 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 598 wiphy_ext_feature_set(wiphy, 599 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 600 wiphy_ext_feature_set(wiphy, 601 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 602 wiphy_ext_feature_set(wiphy, 603 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 604 wiphy_ext_feature_set(wiphy, 605 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 606 607 if (!ops->hw_scan) { 608 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 609 NL80211_FEATURE_AP_SCAN; 610 /* 611 * if the driver behaves correctly using the probe request 612 * (template) from mac80211, then both of these should be 613 * supported even with hw scan - but let drivers opt in. 614 */ 615 wiphy_ext_feature_set(wiphy, 616 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 617 wiphy_ext_feature_set(wiphy, 618 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 619 } 620 621 if (!ops->set_key) 622 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 623 624 if (ops->wake_tx_queue) 625 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 626 627 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 628 629 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 630 631 local = wiphy_priv(wiphy); 632 633 if (sta_info_init(local)) 634 goto err_free; 635 636 local->hw.wiphy = wiphy; 637 638 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 639 640 local->ops = ops; 641 local->use_chanctx = use_chanctx; 642 643 /* 644 * We need a bit of data queued to build aggregates properly, so 645 * instruct the TCP stack to allow more than a single ms of data 646 * to be queued in the stack. The value is a bit-shift of 1 647 * second, so 7 is ~8ms of queued data. Only affects local TCP 648 * sockets. 649 * This is the default, anyhow - drivers may need to override it 650 * for local reasons (longer buffers, longer completion time, or 651 * similar). 652 */ 653 local->hw.tx_sk_pacing_shift = 7; 654 655 /* set up some defaults */ 656 local->hw.queues = 1; 657 local->hw.max_rates = 1; 658 local->hw.max_report_rates = 0; 659 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 660 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 661 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 662 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 663 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 664 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 665 IEEE80211_RADIOTAP_MCS_HAVE_GI | 666 IEEE80211_RADIOTAP_MCS_HAVE_BW; 667 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 668 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 669 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 670 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 671 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 672 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 673 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 674 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 675 676 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 677 678 wiphy->extended_capabilities = local->ext_capa; 679 wiphy->extended_capabilities_mask = local->ext_capa; 680 wiphy->extended_capabilities_len = 681 ARRAY_SIZE(local->ext_capa); 682 683 INIT_LIST_HEAD(&local->interfaces); 684 INIT_LIST_HEAD(&local->mon_list); 685 686 __hw_addr_init(&local->mc_list); 687 688 mutex_init(&local->iflist_mtx); 689 mutex_init(&local->mtx); 690 691 mutex_init(&local->key_mtx); 692 spin_lock_init(&local->filter_lock); 693 spin_lock_init(&local->rx_path_lock); 694 spin_lock_init(&local->queue_stop_reason_lock); 695 696 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 697 INIT_LIST_HEAD(&local->active_txqs[i]); 698 spin_lock_init(&local->active_txq_lock[i]); 699 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 700 local->aql_txq_limit_high[i] = 701 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 702 } 703 704 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 705 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 706 atomic_set(&local->aql_total_pending_airtime, 0); 707 708 INIT_LIST_HEAD(&local->chanctx_list); 709 mutex_init(&local->chanctx_mtx); 710 711 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 712 713 INIT_WORK(&local->restart_work, ieee80211_restart_work); 714 715 INIT_WORK(&local->radar_detected_work, 716 ieee80211_dfs_radar_detected_work); 717 718 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 719 local->smps_mode = IEEE80211_SMPS_OFF; 720 721 INIT_WORK(&local->dynamic_ps_enable_work, 722 ieee80211_dynamic_ps_enable_work); 723 INIT_WORK(&local->dynamic_ps_disable_work, 724 ieee80211_dynamic_ps_disable_work); 725 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 726 727 INIT_WORK(&local->sched_scan_stopped_work, 728 ieee80211_sched_scan_stopped_work); 729 730 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 731 732 spin_lock_init(&local->ack_status_lock); 733 idr_init(&local->ack_status_frames); 734 735 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 736 skb_queue_head_init(&local->pending[i]); 737 atomic_set(&local->agg_queue_stop[i], 0); 738 } 739 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 740 741 if (ops->wake_tx_queue) 742 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 743 744 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 745 746 skb_queue_head_init(&local->skb_queue); 747 skb_queue_head_init(&local->skb_queue_unreliable); 748 skb_queue_head_init(&local->skb_queue_tdls_chsw); 749 750 ieee80211_alloc_led_names(local); 751 752 ieee80211_roc_setup(local); 753 754 local->hw.radiotap_timestamp.units_pos = -1; 755 local->hw.radiotap_timestamp.accuracy = -1; 756 757 return &local->hw; 758 err_free: 759 wiphy_free(wiphy); 760 return NULL; 761 } 762 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 763 764 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 765 { 766 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 767 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 768 int n_suites = 0, r = 0, w = 0; 769 u32 *suites; 770 static const u32 cipher_suites[] = { 771 /* keep WEP first, it may be removed below */ 772 WLAN_CIPHER_SUITE_WEP40, 773 WLAN_CIPHER_SUITE_WEP104, 774 WLAN_CIPHER_SUITE_TKIP, 775 WLAN_CIPHER_SUITE_CCMP, 776 WLAN_CIPHER_SUITE_CCMP_256, 777 WLAN_CIPHER_SUITE_GCMP, 778 WLAN_CIPHER_SUITE_GCMP_256, 779 780 /* keep last -- depends on hw flags! */ 781 WLAN_CIPHER_SUITE_AES_CMAC, 782 WLAN_CIPHER_SUITE_BIP_CMAC_256, 783 WLAN_CIPHER_SUITE_BIP_GMAC_128, 784 WLAN_CIPHER_SUITE_BIP_GMAC_256, 785 }; 786 787 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 788 local->hw.wiphy->cipher_suites) { 789 /* If the driver advertises, or doesn't support SW crypto, 790 * we only need to remove WEP if necessary. 791 */ 792 if (have_wep) 793 return 0; 794 795 /* well if it has _no_ ciphers ... fine */ 796 if (!local->hw.wiphy->n_cipher_suites) 797 return 0; 798 799 /* Driver provides cipher suites, but we need to exclude WEP */ 800 suites = kmemdup(local->hw.wiphy->cipher_suites, 801 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 802 GFP_KERNEL); 803 if (!suites) 804 return -ENOMEM; 805 806 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 807 u32 suite = local->hw.wiphy->cipher_suites[r]; 808 809 if (suite == WLAN_CIPHER_SUITE_WEP40 || 810 suite == WLAN_CIPHER_SUITE_WEP104) 811 continue; 812 suites[w++] = suite; 813 } 814 } else if (!local->hw.cipher_schemes) { 815 /* If the driver doesn't have cipher schemes, there's nothing 816 * else to do other than assign the (software supported and 817 * perhaps offloaded) cipher suites. 818 */ 819 local->hw.wiphy->cipher_suites = cipher_suites; 820 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 821 822 if (!have_mfp) 823 local->hw.wiphy->n_cipher_suites -= 4; 824 825 if (!have_wep) { 826 local->hw.wiphy->cipher_suites += 2; 827 local->hw.wiphy->n_cipher_suites -= 2; 828 } 829 830 /* not dynamically allocated, so just return */ 831 return 0; 832 } else { 833 const struct ieee80211_cipher_scheme *cs; 834 835 cs = local->hw.cipher_schemes; 836 837 /* Driver specifies cipher schemes only (but not cipher suites 838 * including the schemes) 839 * 840 * We start counting ciphers defined by schemes, TKIP, CCMP, 841 * CCMP-256, GCMP, and GCMP-256 842 */ 843 n_suites = local->hw.n_cipher_schemes + 5; 844 845 /* check if we have WEP40 and WEP104 */ 846 if (have_wep) 847 n_suites += 2; 848 849 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 850 * BIP-GMAC-256 851 */ 852 if (have_mfp) 853 n_suites += 4; 854 855 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 856 if (!suites) 857 return -ENOMEM; 858 859 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 860 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 861 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 862 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 863 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 864 865 if (have_wep) { 866 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 867 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 868 } 869 870 if (have_mfp) { 871 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 872 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 873 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 874 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 875 } 876 877 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 878 suites[w++] = cs[r].cipher; 879 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 880 kfree(suites); 881 return -EINVAL; 882 } 883 } 884 } 885 886 local->hw.wiphy->cipher_suites = suites; 887 local->hw.wiphy->n_cipher_suites = w; 888 local->wiphy_ciphers_allocated = true; 889 890 return 0; 891 } 892 893 int ieee80211_register_hw(struct ieee80211_hw *hw) 894 { 895 struct ieee80211_local *local = hw_to_local(hw); 896 int result, i; 897 enum nl80211_band band; 898 int channels, max_bitrates; 899 bool supp_ht, supp_vht, supp_he; 900 struct cfg80211_chan_def dflt_chandef = {}; 901 902 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 903 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 904 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 905 return -EINVAL; 906 907 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 908 (!local->ops->tdls_channel_switch || 909 !local->ops->tdls_cancel_channel_switch || 910 !local->ops->tdls_recv_channel_switch)) 911 return -EOPNOTSUPP; 912 913 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 914 !local->ops->set_frag_threshold)) 915 return -EINVAL; 916 917 if (WARN_ON(local->hw.wiphy->interface_modes & 918 BIT(NL80211_IFTYPE_NAN) && 919 (!local->ops->start_nan || !local->ops->stop_nan))) 920 return -EINVAL; 921 922 #ifdef CONFIG_PM 923 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 924 return -EINVAL; 925 #endif 926 927 if (!local->use_chanctx) { 928 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 929 const struct ieee80211_iface_combination *comb; 930 931 comb = &local->hw.wiphy->iface_combinations[i]; 932 933 if (comb->num_different_channels > 1) 934 return -EINVAL; 935 } 936 } else { 937 /* DFS is not supported with multi-channel combinations yet */ 938 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 939 const struct ieee80211_iface_combination *comb; 940 941 comb = &local->hw.wiphy->iface_combinations[i]; 942 943 if (comb->radar_detect_widths && 944 comb->num_different_channels > 1) 945 return -EINVAL; 946 } 947 } 948 949 /* Only HW csum features are currently compatible with mac80211 */ 950 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 951 return -EINVAL; 952 953 if (hw->max_report_rates == 0) 954 hw->max_report_rates = hw->max_rates; 955 956 local->rx_chains = 1; 957 958 /* 959 * generic code guarantees at least one band, 960 * set this very early because much code assumes 961 * that hw.conf.channel is assigned 962 */ 963 channels = 0; 964 max_bitrates = 0; 965 supp_ht = false; 966 supp_vht = false; 967 supp_he = false; 968 for (band = 0; band < NUM_NL80211_BANDS; band++) { 969 struct ieee80211_supported_band *sband; 970 971 sband = local->hw.wiphy->bands[band]; 972 if (!sband) 973 continue; 974 975 if (!dflt_chandef.chan) { 976 /* 977 * Assign the first enabled channel to dflt_chandef 978 * from the list of channels 979 */ 980 for (i = 0; i < sband->n_channels; i++) 981 if (!(sband->channels[i].flags & 982 IEEE80211_CHAN_DISABLED)) 983 break; 984 /* if none found then use the first anyway */ 985 if (i == sband->n_channels) 986 i = 0; 987 cfg80211_chandef_create(&dflt_chandef, 988 &sband->channels[i], 989 NL80211_CHAN_NO_HT); 990 /* init channel we're on */ 991 if (!local->use_chanctx && !local->_oper_chandef.chan) { 992 local->hw.conf.chandef = dflt_chandef; 993 local->_oper_chandef = dflt_chandef; 994 } 995 local->monitor_chandef = dflt_chandef; 996 } 997 998 channels += sband->n_channels; 999 1000 if (max_bitrates < sband->n_bitrates) 1001 max_bitrates = sband->n_bitrates; 1002 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1003 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1004 1005 if (!supp_he) 1006 supp_he = !!ieee80211_get_he_sta_cap(sband); 1007 1008 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1009 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1010 (supp_ht || supp_vht || supp_he))) 1011 return -EINVAL; 1012 1013 if (!sband->ht_cap.ht_supported) 1014 continue; 1015 1016 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1017 local->rx_chains = 1018 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1019 local->rx_chains); 1020 1021 /* no need to mask, SM_PS_DISABLED has all bits set */ 1022 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1023 IEEE80211_HT_CAP_SM_PS_SHIFT; 1024 } 1025 1026 /* if low-level driver supports AP, we also support VLAN. 1027 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1028 * based on their support to transmit SW encrypted packets. 1029 */ 1030 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1031 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1032 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1033 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1034 } 1035 1036 /* mac80211 always supports monitor */ 1037 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1038 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1039 1040 /* mac80211 doesn't support more than one IBSS interface right now */ 1041 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1042 const struct ieee80211_iface_combination *c; 1043 int j; 1044 1045 c = &hw->wiphy->iface_combinations[i]; 1046 1047 for (j = 0; j < c->n_limits; j++) 1048 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1049 c->limits[j].max > 1) 1050 return -EINVAL; 1051 } 1052 1053 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1054 sizeof(void *) * channels, GFP_KERNEL); 1055 if (!local->int_scan_req) 1056 return -ENOMEM; 1057 1058 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1059 if (!local->hw.wiphy->bands[band]) 1060 continue; 1061 local->int_scan_req->rates[band] = (u32) -1; 1062 } 1063 1064 #ifndef CONFIG_MAC80211_MESH 1065 /* mesh depends on Kconfig, but drivers should set it if they want */ 1066 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1067 #endif 1068 1069 /* if the underlying driver supports mesh, mac80211 will (at least) 1070 * provide routing of mesh authentication frames to userspace */ 1071 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1072 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1073 1074 /* mac80211 supports control port protocol changing */ 1075 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1076 1077 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1078 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1079 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1080 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1081 if (hw->max_signal <= 0) { 1082 result = -EINVAL; 1083 goto fail_workqueue; 1084 } 1085 } 1086 1087 /* Mac80211 and therefore all drivers using SW crypto only 1088 * are able to handle PTK rekeys and Extended Key ID. 1089 */ 1090 if (!local->ops->set_key) { 1091 wiphy_ext_feature_set(local->hw.wiphy, 1092 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1093 wiphy_ext_feature_set(local->hw.wiphy, 1094 NL80211_EXT_FEATURE_EXT_KEY_ID); 1095 } 1096 1097 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1098 wiphy_ext_feature_set(local->hw.wiphy, 1099 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1100 1101 /* 1102 * Calculate scan IE length -- we need this to alloc 1103 * memory and to subtract from the driver limit. It 1104 * includes the DS Params, (extended) supported rates, and HT 1105 * information -- SSID is the driver's responsibility. 1106 */ 1107 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1108 3 /* DS Params */; 1109 if (supp_ht) 1110 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1111 1112 if (supp_vht) 1113 local->scan_ies_len += 1114 2 + sizeof(struct ieee80211_vht_cap); 1115 1116 /* HE cap element is variable in size - set len to allow max size */ 1117 /* 1118 * TODO: 1 is added at the end of the calculation to accommodate for 1119 * the temporary placing of the HE capabilities IE under EXT. 1120 * Remove it once it is placed in the final place. 1121 */ 1122 if (supp_he) 1123 local->scan_ies_len += 1124 2 + sizeof(struct ieee80211_he_cap_elem) + 1125 sizeof(struct ieee80211_he_mcs_nss_supp) + 1126 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1127 1128 if (!local->ops->hw_scan) { 1129 /* For hw_scan, driver needs to set these up. */ 1130 local->hw.wiphy->max_scan_ssids = 4; 1131 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1132 } 1133 1134 /* 1135 * If the driver supports any scan IEs, then assume the 1136 * limit includes the IEs mac80211 will add, otherwise 1137 * leave it at zero and let the driver sort it out; we 1138 * still pass our IEs to the driver but userspace will 1139 * not be allowed to in that case. 1140 */ 1141 if (local->hw.wiphy->max_scan_ie_len) 1142 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1143 1144 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1145 local->hw.n_cipher_schemes)); 1146 1147 result = ieee80211_init_cipher_suites(local); 1148 if (result < 0) 1149 goto fail_workqueue; 1150 1151 if (!local->ops->remain_on_channel) 1152 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1153 1154 /* mac80211 based drivers don't support internal TDLS setup */ 1155 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1156 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1157 1158 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1159 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1160 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1161 1162 /* mac80211 supports multi BSSID, if the driver supports it */ 1163 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1164 local->hw.wiphy->support_mbssid = true; 1165 if (ieee80211_hw_check(&local->hw, 1166 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1167 local->hw.wiphy->support_only_he_mbssid = true; 1168 else 1169 local->ext_capa[2] |= 1170 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1171 } 1172 1173 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1174 1175 /* 1176 * We use the number of queues for feature tests (QoS, HT) internally 1177 * so restrict them appropriately. 1178 */ 1179 if (hw->queues > IEEE80211_MAX_QUEUES) 1180 hw->queues = IEEE80211_MAX_QUEUES; 1181 1182 local->workqueue = 1183 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1184 if (!local->workqueue) { 1185 result = -ENOMEM; 1186 goto fail_workqueue; 1187 } 1188 1189 /* 1190 * The hardware needs headroom for sending the frame, 1191 * and we need some headroom for passing the frame to monitor 1192 * interfaces, but never both at the same time. 1193 */ 1194 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1195 IEEE80211_TX_STATUS_HEADROOM); 1196 1197 /* 1198 * if the driver doesn't specify a max listen interval we 1199 * use 5 which should be a safe default 1200 */ 1201 if (local->hw.max_listen_interval == 0) 1202 local->hw.max_listen_interval = 5; 1203 1204 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1205 1206 local->dynamic_ps_forced_timeout = -1; 1207 1208 if (!local->hw.max_nan_de_entries) 1209 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1210 1211 if (!local->hw.weight_multiplier) 1212 local->hw.weight_multiplier = 1; 1213 1214 ieee80211_wep_init(local); 1215 1216 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1217 1218 ieee80211_led_init(local); 1219 1220 result = ieee80211_txq_setup_flows(local); 1221 if (result) 1222 goto fail_flows; 1223 1224 rtnl_lock(); 1225 result = ieee80211_init_rate_ctrl_alg(local, 1226 hw->rate_control_algorithm); 1227 rtnl_unlock(); 1228 if (result < 0) { 1229 wiphy_debug(local->hw.wiphy, 1230 "Failed to initialize rate control algorithm\n"); 1231 goto fail_rate; 1232 } 1233 1234 if (local->rate_ctrl) { 1235 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1236 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1237 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1238 } 1239 1240 /* 1241 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1242 * or have it when we don't, copy the sband structure and set/clear it. 1243 * This is necessary because rate scaling algorithms could be switched 1244 * and have different support values. 1245 * Print a message so that in the common case the reallocation can be 1246 * avoided. 1247 */ 1248 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1249 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1250 struct ieee80211_supported_band *sband; 1251 bool local_cap, ie_cap; 1252 1253 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1254 1255 sband = local->hw.wiphy->bands[band]; 1256 if (!sband || !sband->vht_cap.vht_supported) 1257 continue; 1258 1259 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1260 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1261 1262 if (local_cap == ie_cap) 1263 continue; 1264 1265 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1266 if (!sband) { 1267 result = -ENOMEM; 1268 goto fail_rate; 1269 } 1270 1271 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1272 band); 1273 1274 sband->vht_cap.vht_mcs.tx_highest ^= 1275 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1276 1277 local->hw.wiphy->bands[band] = sband; 1278 local->sband_allocated |= BIT(band); 1279 } 1280 1281 result = wiphy_register(local->hw.wiphy); 1282 if (result < 0) 1283 goto fail_wiphy_register; 1284 1285 debugfs_hw_add(local); 1286 rate_control_add_debugfs(local); 1287 1288 rtnl_lock(); 1289 wiphy_lock(hw->wiphy); 1290 1291 /* add one default STA interface if supported */ 1292 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1293 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1294 struct vif_params params = {0}; 1295 1296 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1297 NL80211_IFTYPE_STATION, ¶ms); 1298 if (result) 1299 wiphy_warn(local->hw.wiphy, 1300 "Failed to add default virtual iface\n"); 1301 } 1302 1303 wiphy_unlock(hw->wiphy); 1304 rtnl_unlock(); 1305 1306 #ifdef CONFIG_INET 1307 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1308 result = register_inetaddr_notifier(&local->ifa_notifier); 1309 if (result) 1310 goto fail_ifa; 1311 #endif 1312 1313 #if IS_ENABLED(CONFIG_IPV6) 1314 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1315 result = register_inet6addr_notifier(&local->ifa6_notifier); 1316 if (result) 1317 goto fail_ifa6; 1318 #endif 1319 1320 return 0; 1321 1322 #if IS_ENABLED(CONFIG_IPV6) 1323 fail_ifa6: 1324 #ifdef CONFIG_INET 1325 unregister_inetaddr_notifier(&local->ifa_notifier); 1326 #endif 1327 #endif 1328 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1329 fail_ifa: 1330 #endif 1331 wiphy_unregister(local->hw.wiphy); 1332 fail_wiphy_register: 1333 rtnl_lock(); 1334 rate_control_deinitialize(local); 1335 ieee80211_remove_interfaces(local); 1336 rtnl_unlock(); 1337 fail_rate: 1338 fail_flows: 1339 ieee80211_led_exit(local); 1340 destroy_workqueue(local->workqueue); 1341 fail_workqueue: 1342 if (local->wiphy_ciphers_allocated) 1343 kfree(local->hw.wiphy->cipher_suites); 1344 kfree(local->int_scan_req); 1345 return result; 1346 } 1347 EXPORT_SYMBOL(ieee80211_register_hw); 1348 1349 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1350 { 1351 struct ieee80211_local *local = hw_to_local(hw); 1352 1353 tasklet_kill(&local->tx_pending_tasklet); 1354 tasklet_kill(&local->tasklet); 1355 1356 #ifdef CONFIG_INET 1357 unregister_inetaddr_notifier(&local->ifa_notifier); 1358 #endif 1359 #if IS_ENABLED(CONFIG_IPV6) 1360 unregister_inet6addr_notifier(&local->ifa6_notifier); 1361 #endif 1362 1363 rtnl_lock(); 1364 1365 /* 1366 * At this point, interface list manipulations are fine 1367 * because the driver cannot be handing us frames any 1368 * more and the tasklet is killed. 1369 */ 1370 ieee80211_remove_interfaces(local); 1371 1372 rtnl_unlock(); 1373 1374 cancel_delayed_work_sync(&local->roc_work); 1375 cancel_work_sync(&local->restart_work); 1376 cancel_work_sync(&local->reconfig_filter); 1377 cancel_work_sync(&local->tdls_chsw_work); 1378 flush_work(&local->sched_scan_stopped_work); 1379 flush_work(&local->radar_detected_work); 1380 1381 ieee80211_clear_tx_pending(local); 1382 rate_control_deinitialize(local); 1383 1384 if (skb_queue_len(&local->skb_queue) || 1385 skb_queue_len(&local->skb_queue_unreliable)) 1386 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1387 skb_queue_purge(&local->skb_queue); 1388 skb_queue_purge(&local->skb_queue_unreliable); 1389 skb_queue_purge(&local->skb_queue_tdls_chsw); 1390 1391 wiphy_unregister(local->hw.wiphy); 1392 destroy_workqueue(local->workqueue); 1393 ieee80211_led_exit(local); 1394 kfree(local->int_scan_req); 1395 } 1396 EXPORT_SYMBOL(ieee80211_unregister_hw); 1397 1398 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1399 { 1400 WARN_ONCE(1, "Have pending ack frames!\n"); 1401 kfree_skb(p); 1402 return 0; 1403 } 1404 1405 void ieee80211_free_hw(struct ieee80211_hw *hw) 1406 { 1407 struct ieee80211_local *local = hw_to_local(hw); 1408 enum nl80211_band band; 1409 1410 mutex_destroy(&local->iflist_mtx); 1411 mutex_destroy(&local->mtx); 1412 1413 if (local->wiphy_ciphers_allocated) 1414 kfree(local->hw.wiphy->cipher_suites); 1415 1416 idr_for_each(&local->ack_status_frames, 1417 ieee80211_free_ack_frame, NULL); 1418 idr_destroy(&local->ack_status_frames); 1419 1420 sta_info_stop(local); 1421 1422 ieee80211_free_led_names(local); 1423 1424 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1425 if (!(local->sband_allocated & BIT(band))) 1426 continue; 1427 kfree(local->hw.wiphy->bands[band]); 1428 } 1429 1430 wiphy_free(local->hw.wiphy); 1431 } 1432 EXPORT_SYMBOL(ieee80211_free_hw); 1433 1434 static int __init ieee80211_init(void) 1435 { 1436 struct sk_buff *skb; 1437 int ret; 1438 1439 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1440 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1441 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1442 1443 ret = rc80211_minstrel_init(); 1444 if (ret) 1445 return ret; 1446 1447 ret = ieee80211_iface_init(); 1448 if (ret) 1449 goto err_netdev; 1450 1451 return 0; 1452 err_netdev: 1453 rc80211_minstrel_exit(); 1454 1455 return ret; 1456 } 1457 1458 static void __exit ieee80211_exit(void) 1459 { 1460 rc80211_minstrel_exit(); 1461 1462 ieee80211s_stop(); 1463 1464 ieee80211_iface_exit(); 1465 1466 rcu_barrier(); 1467 } 1468 1469 1470 subsys_initcall(ieee80211_init); 1471 module_exit(ieee80211_exit); 1472 1473 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1474 MODULE_LICENSE("GPL"); 1475